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House Extension in city

House extension comes with a wide variety of benefits which makes it easy to see why the extension could be a excellent uptick in the possible rate of your property in terms of sales. So if you're seeking to construct a brand-new residence extension however still not convinced about the job, we're below to help you. Being completely mindful any house building and construction work is normally a heavy investment, there's a huge need to be set on your choice before arranging the beginning of any type of job. So are house extensions worth it? Below are a few of the leading benefits provided by house extensions to assist you decide if it's one of the most ideal route for you.

 

What's Involved in Including an Extension?

The steps will differ depending on the range of your extension, however you can anticipate some, if not all, of the below to be included when including an expansion to your home:

 

  1. Obtaining Building Regulations or Planning Permission (if required as the extension is larger than permitted development).
  2. Checking your leasehold contract (if appropriate) to ensure you can do what you wish to do.
  3. Getting an architect  to prepare the plans, considering your planned use ( kitchen area, shower room, study).
  4. Hiring a competent builder with experience of larger projects.
  5. Calling your insurance supplier to let them understand of the planned work ahead of it starting.
  6. Obtaining car parking allows if required for your specialists to ensure they have very easy access to your residential property.
  7. Making sure all intended work drops within permitted allowables.
  8. Clearing the space as well as digging deep into if essential, including the elimination of trees.
  9. Structure job can begin.

 

What is the cost of a house extension in city?

If you're considering adding a 2 floor house extension, then setting a budget for this job would be a wonderful way to start. Similar to a back extension, a 2 storey extension normally leaves the remainder of the building needing some job and also, because of its size, this may imply the re-development of the whole house - which is why they can be very costly. Several of the various other influencing variables that can have large effect on a two storey house extension price consists of: your area, the dimension of the develop, intricacy of the design (anything beyond the standard develop will usually need more know-how and also time), the glazing to be incorporated (the more the glass utilized in the job, the more the product cost), as well as the team used.

Average House extensions cost in Northolt

The regular cost of House extensions are £51,667 in Northolt. Costs vary based upon the materials and the company picked. The upper price range can be as high as £73,000. The material costs are in most cases around£10,500.

Average price per House extensions job in 2026

Avg. price low

Avg. price low
£32,000

Avg. price

Avg. price
£51,667

Avg. price high

Avg. price high
£73,000

£73500

£55125

£36750

£18375

£0

Prices based on actual House extensions costs for Northolt, as reported by local LeadsDoWork members.

House extensions installation cost in Northolt 2026

Labour cost £27,000
Material cost £10,500
Waste removal £2,500
Time frame: 10-14 weeks

House extensions searches in September 2026

House extensions Projects in Northolt in August 2026

1,307

Requests for quotations in Northolt in August 2026

7

Requests for House extensions quotations in Northolt in August 2026. 17% change from July 2026.

50

Requests for House extensions quotations in Middlesex in August 2026. 25% change from July 2026.

Source: Numbers calculated based on the search volumes in major search engines

House extensions searches in cities and towns near Northolt August 2026

11

Requests for quotations in Southall in August 2026

9

Requests for quotations in Uxbridge in August 2026

9

Requests for quotations in Greenford in August 2026

7

Requests for quotations in Northolt in August 2026

7

Requests for quotations in Hayes in August 2026

Northolt

The northwest London town of Northolt is inside the Borough of Ealing and has a population over 40,000. This is a significant increase from 1801, when there were just 336 residents. For all home developments within the Northolt area, you'll want to make use of vetted specialists to get the very best cost for any work you would like concluded.

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House extensions pros in Northolt

Jassi Builders Ltd

2 review(s)
Based: in Hayes, UB4 9YD

Hi Jassi Builders LTD here, I am a specialist in planning, designing and building control services. I make sure that I have completed all my work on perfect time and leave customers in complete satisfaction. We do all types of loft conversions, exten...

Latest review

Julian F., HP2
4

House Extensions in Hemel Hempstead

No quote received

Dream the Build

19 review(s)
Based: in London, EC1V 2NX

DREAM the Build. Ltd ' Constructing your Vision Making home development exciting, fun and asset building experience , future proofing household & investors Who we are ? Starting fresh in a new country is never easy, but what we did Catal...

Latest review

Patricia Z., SE21
5

House Extensions in London

Great consultation by Catalin Spent a lot of time with us understanding the project and various options.

Tectra Partnership Ltd

1 review(s)
Based: in Slough, SL3 0JE

Latest review

Deepak S., KT10
5

House Extensions in Esher

excellent communication

JPA Building Construction LTD

1 review(s)
Based: in Twickenham , TW1 1AG

Latest review

Rosa S., SE20
5

House Extensions in London

Very nice and helpful unfortunately I am looking for a builder who lives nearby my property

Similar Customer Enquiries for House extensions in Northolt

05 Mar

House Extensions

Northolt - UB5

Enquiry from: Boma F

Start Date: 1 to 3 months

i will like the extension to the kitchen and dinning room to the rear are you the property owner: owner of the property property type: semi detached looking for: single storey extension do you have pl...

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04 Mar

House Extensions

Northolt - UB5

Enquiry from: Arusa S

Start Date: Immediate

side double story ext +/- loft conversion

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07 Dec

House Extensions

Northolt - UB5

Enquiry from: Joanna D

Start Date: Immediate

knocking existing diner, garage , small bathroom and laundry room into one open plan area, then create a new child bedroom. creating functional open plan space which includes (bedroom, dining and kitc...

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19 Nov

House Extensions

Northolt - UB5

Enquiry from: Sonata A

Start Date: Immediate

All width extention aprox. 5.1m x 3m

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03 Aug

House Extensions

Northolt - UB5

Enquiry from: Shamal R

Start Date: 1 to 3 months

Homeowner Please contact to appoint

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30 Apr

House Extensions

Northolt - UB5

Enquiry from: Sarah L

Start Date: Less than one month

Are you the property owner: Owner of the property Property Type: Other How many bedrooms does the property have: 3-4 Bedrooms Other Forms: 45 Agreed to recieve quotes for selected products: Yes Pleas...

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05 Feb

House Extensions

Northolt - UB5

Enquiry from: Bilton H

Start Date: Immediate

Rear signal extension Customer is currently in the process of looking for quotes to add a Single storey extension to their property. Are you the property owner: Owner of the property Property Type: T...

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08 Jul

House Extensions

Northolt - UB5

Enquiry from: Leighan E

Start Date: Immediate

Are you the property owner: Owner of the property Is the work for domestic or commercial purposes: Domestic Other Forms: 18, 19, 45 Agreed to recieve quotes for selected products: Yes Please call to ...

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06 Jul

House Extensions

Northolt - UB5

Enquiry from: Wole O

Start Date: Less than one month

Are you the property owner: Owner of the property Property Type: Semi detached How many bedrooms does the property have: 3-4 Bedrooms Other Forms: 17, 45 Agreed to recieve quotes for selected product...

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04 Jun

House Extensions

Northolt - UB5

Enquiry from: Raj T

Start Date: Immediate

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Semi detached, Work description: We want convert the 3 bedroom to a five bedroom with kitchen

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03 Apr

House Extensions

Northolt - UB5

Enquiry from: Haran S

Start Date: Less than one month

Are you the property owner: Owner of the property Property Type: Semi detached How many bedrooms does the property have: 5+ Bedrooms Other Forms: 17, 45, 35, 16, 96 Agreed to recieve quotes for selec...

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03 Mar

House Extensions

Northolt - UB5

Enquiry from: Mostafa S

Start Date: Immediate

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Semi detached, Work description: I have already a 3 meter back extention and looking for an extra 3 meter Ba...

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21 Feb

House Extensions

Northolt - UB5

Enquiry from: Mrs B

Start Date: Immediate

Home owner House Extension Please call to appoint

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19 Jul

House Extensions

Northolt - UB5

Enquiry from: Bader M

Start Date: 3+ months

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Semi detached, Work description: A side extension of single story, its approximately 12m by 2.5m this s...

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19 Jun

House Extensions

Northolt - UB5

Enquiry from: Waldemar W

Start Date: 3+ months

Customer visited the myhouseextension.co.uk site and submitted an enquiry. Property type: Semi detached, Work description: loft extension required Are you the property owner: Owner of the property...

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13 Mar

House Extensions

Northolt - UB5

Enquiry from: Kul S

Start Date: Immediate

Extending on side with small shower, Kitchen, Roof window, move the drainage hole further away, 3 doors, 2 windows, Electrical and plumbing works.

Post a similar request >

24 Feb

House Extensions

Northolt - UB5

Enquiry from: Chris C

Start Date: Immediate

Extension to back of house - 2 storey Are you the property owner: Owner of the property Property Type: Semi detached Looking For: Double storey extension Do you have planning permission: No Would you ...

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07 Feb

House Extensions

Northolt - UB5

Enquiry from: A

Start Date: Immediate

I need to build side extension, 5 meters in length x 235 wide and flat roof

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28 Jan

House Extensions

Northolt - UB5

Enquiry from: Ashis B

Start Date: 3+ months

Home owner Double storey side extension Width=3M Length=7M Roof: Pitched Option 2: Single Storey side extension Same dimensions as above Roof: Flat Full plans and Planning permission in Place...

Post a similar request >

17 Nov

House Extensions

Northolt - UB5

Enquiry from: P P

Start Date: Immediate

Home Owner Single Storey Extension Customer Requires Assistance with Plans and Planning Permission Please Call to Appoint *

Post a similar request >

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FAQs

how much is a double house extension?

A double house extension is basically a construction to any aspect of your house that elevates up to offer two floors of space. It can be structured to suit your existing home in two storeys or as a side wing on a taller property. If you’re considering building a double house extension, then estimating the cost is a very important task to do before commencing the project. In this article, we’ll give you an idea of the cost of a double house extension so you can estimate yours accordingly.

The double house extension cost depends on several factors that’s specific to your home as well as your design choice. These includes:

• Location of your property. Places like London and the southeast will generally cost more than the other regions due to higher demands.

• Accessibility of the site. The ease of your site’s accessibility also plays a key role in the price.

• Size of the extension. The more the extension’s size in footprint and square metres, the higher the possible costs.

• Materials used in making the roof as well as the complexity of the roof design.

• Your choice of finishing. These includes flooring window and door frames, glazing, underfloor heating and roof lights.

• Your property’s soil type. Different types of soil requires varying treatments as well as materials to develop solid foundations.

Constructing a double house extension is a quite simple build in terms of technicality when its to the side or rear of your house as this can also help you save some money. Generally, considerably expanding your home’s space by building a double house extension will cost within the range of £1,500 per m2 to about £2,800 per m2.

Do I need my neighbours’ permission for an extension?

Well the reality is, sometimes, neighbours just don’t get along. With several individuals living in close proximity, it’s little surprise they tend to get on one another’s nerves from time to time. However, there’s a difference between having a tiff and being able to transform your house the way you want without having to obtain your neighbour’s approval.

The short and simple answer to this question is, not necessarily. However, you must first educate yourself by thinking about your extension and how it affects the houses around you. We’d strongly recommend you talk proposals through with your neighbour so as to avoid possible conflicts later. There are a number of reasons why your neighbour can protest to your new home extension plans. Let’s take a look!

 

  • In the event whereby your new extension is blocking their view or providing an unwanted shade on their property. Here, they have a legitimate reason to protest as no one would want their once sunny garden suddenly covered or plummet into shade.
  • In the event where it leads to a loss of privacy. For instance, if your new extension possesses a window which overlooks the neighbour’s property in any way. This is likely to be taken as an invasion of privacy and that has a little to no chance of being a welcomed idea.
  • If it’s a major project and going to take a lot of weeks before completion. The noise generated, especially when your neighbours are enjoying your summer holidays or weekends, can make their gardens not as relaxing as it used to be.
Can an extension add value to my home?

Yes. Most extensions will add substantial value to your home, and you may find that the extension adds more value than it cost. However, it’s important to be sure that the home remains balanced. Extending your garage and leaving your property with no parking spaces, for example, may impact your ability to sell.

how long do house extensions take?

If you’re about to start your house extension project and wondering how long it’ll take to complete, you’re not alone! This is one of the most common questions that’s asked by homeowners in the UK and across the globe. However, there’s no single precise answer for this as there are multiple factors that’ll affect the length of time it’ll take to complete your home extension. These factors include the size of the construction work as well as whether you’re planning to live in the house after completion or otherwise.

For a single extension, the length of time it’ll take to complete the home extension is normally up to 3 months. So let’s break this down:

As you would have expected, the first step to be taken is the preparation of the site. You start by digging out the footing and preparing the foundation which should take about 2 weeks. This is then followed by the damp course installation as well as the fitting of any drains needed around the extension which will also take a further 2 weeks.

The 5th week will be for the construction of the external walls as well as putting the blockwork in place for the provision of the cavity wall insulation. A further 2 weeks after this, will be dedicated to the installation of the roof structure and the internal walls.

It’s at this junction that you’ll call on your weather proof installer to fit in your uPVC windows and doors. Once done, the gas fitters and electricians will have to be on site to connect power to your new extension building. Subsequently, this will be followed by internal wall plastering as well as breaking through your main house. Once the plaster is dried, decorations completed and all the required furniture and units installed, the extension is ready for use.

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Northolt House extensions installers are rated 4.5 out of 5 based on 13 reviews of 91 pros.
The LeadsDoWork rating and review is an overall rating based on verified reviews and feedback from the customers with House extensions projects that have been connected with House extensions pros to help them. All House extensions contractors All Northolt House extensions contractors

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